Experimental study of cold-formed steel floors made of hollow flange channel section joists under fire conditions

Jatheeshan, V. & Mahendran, M. (2016) Experimental study of cold-formed steel floors made of hollow flange channel section joists under fire conditions. Journal of Structural Engineering, 142(2), Article Number-04015134.

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Fire safety plays a vital role in building design because appropriate level of fire safety is important to safeguard lives and property. Cold-formed steel channel sections along with fire-resistive plasterboards are used to construct light-gauge steel frame (LSF) floor systems to provide adequate fire resistance ratings (FRR). It is common practice to use lipped channel sections (LCS) as joists in LSF floor systems, and past research has only considered such systems. This research focuses on adopting improved joist sections such as hollow flange channel (HFC) sections to improve the structural performance and FRR of cold-formed LSF floor systems under standard fire conditions. The structural and thermal performances of LSF floor systems made of a welded HFC, LiteSteel Beams (LSB), with different plasterboard and insulation configurations, were investigated using four full-scale fire tests under standard fires. These fire tests showed that the new LSF floor system with LSB joists improved the FRR in comparison to that of conventional LCS joists. Fire tests have provided valuable structural and thermal performance data of tested floor systems that included time-temperature profiles and failure times, temperatures, and modes. This paper presents the details of the fire tests conducted in this study and their results along with some important findings.

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ID Code: 87962
Item Type: Journal Article
Refereed: Yes
Keywords: Fire tests, Light-gauge steel frame (LSF) floor systems, Hollow flange channel sections, LiteSteel Beams, Fire resistance rating, Local buckling, Metal and composite structures
DOI: 10.1061/(ASCE)ST.1943-541X.0001409
ISSN: 0733-9445
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 American Society of Civil Engineers
Deposited On: 02 Oct 2015 00:07
Last Modified: 09 May 2016 00:59

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